More socially proficient participants performed well on the empathic accuracy task regardless of whether they were on oxytocin or placebo. By contrast, less socially proficient participants performed poorly on placebo but significantly better on oxytocin. In fact, on oxytocin, their empathic accuracy performance was identical to that of the socially proficient participants.

Full information available on http://www.eurekalert.org/pub_releases/2010-09/tmsh-hoi092110.php